The Tor Browser / file revision

 /* This Source Code Form is subject to the terms of the Mozilla Public

  * License, v. 2.0. If a copy of the MPL was not distributed with this

  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

 "use strict";

 // TODO Fennec support in Bug #894525

 module.metadata = {

   "engines": {

     "Firefox": "*"

   }

 }

 const { openTab, closeTab } = require("sdk/tabs/utils");

 const { Loader } = require("sdk/test/loader");

 const { setTimeout } = require("sdk/timers");

 exports["test unload tab observer"] = function(assert, done) {

   let loader = Loader(module);

   let window = loader.require("sdk/deprecated/window-utils").activeBrowserWindow;

   let observer = loader.require("sdk/tabs/observer").observer;

   let opened = 0;

   let closed = 0;

   observer.on("open", function onOpen(window) { opened++; });

   observer.on("close", function onClose(window) { closed++; });

   // Open and close tab to trigger observers.

   closeTab(openTab(window, "data:text/html;charset=utf-8,tab-1"));

   // Unload the module so that all listeners set by observer are removed.

   loader.unload();

   // Open and close tab once again.

   closeTab(openTab(window, "data:text/html;charset=utf-8,tab-2"));

   // Enqueuing asserts to make sure that assertion is not performed early.

   setTimeout(function () {

     assert.equal(1, opened, "observer open was called before unload only");

     assert.equal(1, closed, "observer close was called before unload only");

     done();

   }, 0);

 };

 require("test").run(exports);